应变测量仪的自校准电路设计及应用  

Design and application of a self⁃calibration circuit for strain measuring instrument

作　　者：刘耀 王文健[1] LIU Yao;WANG Wenjian(Changcheng Institute of Metrology&Measurement,Beijing 100095,China)

机构地区：[1]航空工业北京长城计量测试技术研究所,北京100095

出　　处：《计测技术》2023年第2期105-111,共7页Metrology & Measurement Technology

基　　金：国家仪器工程项目(2006ZCTF0021)。

摘　　要：为解决应变测量仪在使用分流法进行校准时存在的费时耗力效率低下、精度不足等问题,实现应变信号的高精度采集,研究并设计了低漂移、低噪声的自校准电路,程控配置采集通道和校准信号,拟合出采集信号和自校准信号之间的函数关系式,获取校准系数,对应变测量结果进行校正,有效降低应变测量的温度漂移误差和噪声误差,满足应变测量仪精度的指标要求。In order to solve the problems of time⁃consuming,labor⁃intensive,low efficiency and insufficient accuracy in the calibration of strain gauges using the split flow method and achieve high⁃precision acquisition of strain signals,a low drift and low noise self⁃calibration circuit has been studied and designed.The acquisition channel and calibration signal are configured by program control.The functional relationship between the acquisition signal and the self⁃calibration signal is fitted,and the calibration coefficient is obtained.The strain measurement results are corrected,which effectively reduces the temperature drift error and noise error of strain measurement and meets the accuracy requirements of strain measuring instruments.

关 键 词：应变测量仪 自校准 低漂移 

分 类 号：TB971[一般工业技术—计量学]